See what landed recently in Firefox Nightly!

Starting with Firefox 145, Nightly and Beta builds (b6 and earlier) can now find previously visited pages using Semantic History Search, which lets users recall sites with natural-language and concept-based queries, all processed locally for privacy. (Learn more)

WebGPU support is now enabled for all macOS versions on devices with Apple Silicon processors.

Zero copy video of hardware decoded video with AMD GPUs if supported, improving video playback performance on those systems.

Firefox now supports the Freedesktop.org XDG Base Directory Specification.

Firefox now supports the Safe Browsing V5 protocol and is migrating from Safe Browsing V4 to the local list mode of Safe Browsing V5 protocol.

Starting with Firefox 146, Nightly builds have improved support for screen readers accessing mathematical formulas embedded in PDFs.

A draggable button is now draggable if the drag is started from the button itself.

Starting with Firefox 145, Nightly builds now support Storage-Access-Headers allowing servers to opt-in into un-partitioned cookies via HTTP headers if storage-access was granted prior with the Storage-Access-API.

Starting with Firefox 146, Nightly builds now support the Sanitizer API, which provides new methods for HTML manipulation. The element.setHTML() method enables developers to insert HTML content similarly to element.innerHTML, but without the security vulnerabilities such as cross-site scripting (XSS). A complementary method, document.parseHTML(), is also available for parsing HTML safely.

Starting with Firefox 146, added support for calling showPicker() on text-based <input> elements with an associated <datalist>, allowing programmatic display of autofill suggestions for users on Nightly builds or Beta builds (b6 and earlier).

Starting with Firefox 146, Nightly builds now support the Navigation API. This API provides the ability to initiate, intercept, and manage browser navigation actions. It is a successor to previous web platform features such as the History API and window.location, which solves their shortcomings.

Starting with Firefox 145, support has been added for CSS module scripts, disabled by default using the preference layout.css.module-scripts.enabled. CSS module scripts allow for CSS scripts to be imported like ECMAScript modules using import attributes.

Starting with Firefox 145, Nightly builds now support CSS anchor positioning, which allows to tether elements together. The anchor-positioned elements can then have their size and position set relative to the size and location of the anchor elements to which they are bound.

Starting with Firefox 145, the Trusted Types API, primarily aimed at preventing cross-site scripting attacks, is now enabled in Nightly.

Added support for the Navigation API. This API provides the ability to initiate, intercept, and manage browser navigation actions. It is a successor to previous web platform features such as the History API and window.location, which solves their shortcomings.

The CSS counter-* and quotes properties are now supported in the ::marker pseudo-element.

Both CompressionStream and DecompressionStream now support the Brotli format.

Firefox now exposes the view transition currently active on the document via the Document.activeViewTransition property.

Firefox now supports the :active-view-transition-type selector and associated View Transitions API changes.

CSS Module Scripts allow stylesheets to be imported using the JavaScript module system and import attributes, for more information, please see https://developer.mozilla.org/docs/Web/JavaScript/Guide/Modules#loading_non-javascript_resources.

The initial empty document is now Web-compatible: if the first navigation of a browsing context goes to about:blank, it completes synchronously and is no longer replaced by a second parser-generated document.

On Windows, clicking tabs may not work at the very top of the screen when Firefox is maximized on a second monitor. We’re working to fix this in a future release.